2014
高考英语完形填空基础练习（10）及答案 完形填空（议论文） .in 1997 the first cloned mammal was born, that’s a landmark in the history of science. but that’s also a dilemma (进退两难) : whether or not to try and save more 1 through human cloning. this controversy (争论) 2 for a really long time. but i don’t think this controversy will reach a 3 in a short time 4 i
